Abstract: The cryogenic metal treatment can obviously improve the mechanical property of the materials as high speed steels, die steels, tool steels bearing steels and steels with high contents of carbon and alloy elements to raise their wearing resistance. Based on the former vacuum type devices, an automatically hydraulic cryogenic metal treatment device has been developed, which is easy to operate and reliable in performances. The automatic control to the cryogentic treatment technology can be achieved with the device. The accuracy of the technological process is increased. The performance of treated metal works by means of the device is better than the result obtained with the former device.